Adjustable Upper Rear Control Arms

[ed1948]

Help me spend my money wisely and looking to update a little at a time

.
1986 SS, stock for now. Looking at the Hotchkiss system.
I would eventually hope to update the suspension systems. I wonder if I should start with the (adjustable)upper rear control arms? I get high speed,(60 mph+) vibration felt in the body, not steering wheel. The tires had been rebalanced which leaves either a driveshaft, wrong pinion angle or brake drums. All suspension bushings are still original at 90k miles.

 

[GuysMonteSS]

The vibration you're experiencing should be addressed first.
It might be something as simple as a bad U Joint.
Body bushings should be on the top of your "To Do" list.Theres lots of threads on here about this.
Here is a link that is a good starting point to accomplish this task;

Bushing Replacement Procedure

Turbo Regal Performance Recipes

www.gnttype.org

Lots of guys here have done this and have lots of tips.
If you have a big enough budget I can recommend Mark Savitske at SC&C for help with suspension upgrades;

SC&C

scandc.com

He can offer solid advice and has kick *ss kits.
Guy

 

[gnvair]

Mid 80's G bodies were notorious for driveline vibrations most noticeable in overdrive with the torque converter locked. I would look the driveshaft. I highly doubt the pinion angle is off unless the car was the victim of a bad accident OR the bushings are falling out of the control arms.

 

[TURNA]

Adjustable upper arms........,METCO Motorsports

Welcome to Metco Motorsports - Hardcore Performance Parts Precision Made in the USA!

 

[Macguyver]

Help me spend my money wisely and looking to update a little at a time View attachment 138884 .
1986 SS, stock for now. Looking at the Hotchkiss system.
I would eventually hope to update the suspension systems. I wonder if I should start with the (adjustable)upper rear control arms? I get high speed,(60 mph+) vibration felt in the body, not steering wheel. The tires had been rebalanced which leaves either a driveshaft, wrong pinion angle or brake drums. All suspension bushings are still original at 90k miles.

Give the shop a call and we will send you out a set for only $179.99, new hardware, free shipping and a T-shirt! DID I MENTION A STICKER KIT ALSO, LOL?
Best price around.
Tell them I sent you.

Use Promo code madmacpromo20

https://southsidemachineperformance.com/shop?olsPage=products%2Fgdau-double-adjustable-upper-control-arms-gm-g-body-1978-1988

 

[Macguyver]

Good for everyone on here!

Use Promo code madmacpromo20

https://southsidemachineperformance...stable-upper-control-arms-gm-g-body-1978-1988

 

[melloelky]

nice job

 

[Injectedcutty]

Adjustable upper arms........,METCO Motorsports

Welcome to Metco Motorsports - Hardcore Performance Parts Precision Made in the USA!

Oooh, if comes with a sticker, I'm sold.

 

[pontiacgp]

you might have a bent axle...

 

[ed1948]

Re: vibration - body mounts replaced, wheels spun to check for wobble and tire run out, body and frame show no signs of damage or repair, rear tires rebalanced, U joints recent, trans tailshaft bushing new. I can not verify the drums and driveshaft are in balance. No weights appear to be missing on shaft. In a few days I'll check the rear suspension.